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Overview of the Current Week
2025/05/09 - 2025/05/16
A red tide was sighted during the past week, an inter-departmental red tide working group reported today (May 16).
On May 10, staff of the Marine Department spotted a red tide at Victoria Harbour near Hung Hom. The red tide has dissipated. No associated fish deaths have been reported as of today.
A spokesman for the working group said, "The red tide was formed by Noctiluca scintillans, which is commonly found in Hong Kong waters and non-toxic."
Red tide is a natural phenomenon. The AFCD's proactive phytoplankton monitoring programme will continue to monitor red tide occurrences to minimise the impact on the mariculture industry and the public.
Please click here to view the location of red tide sighted in Hong Kong waters.
You can visit the Hong Kong Red Tide Information Network for information about red tide or press here to view real-time water quality in fish culture zones.
Last update: 2025/05/16 noon
Red Tide Reporting Network
We welcome your assistance in reporting red tide to us. Please record the following information:
(1) location of red tide
(2) colour of the seawater
(3) extent of the red tide
(4) occurrence of dead fish and any other abnormal features observed around the red tide.
Please report to:
3468 3714 (office hours) OR 1823 (outside office hours)
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